/* TechFlare AI — Global Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-50:#EEF2FF;--primary-100:#E0E7FF;--primary-200:#C7D2FE;--primary-300:#A5B4FC;
    --primary-400:#818CF8;--primary-500:#6366F1;--primary-600:#4F46E5;--primary-700:#4338CA;
    --primary-800:#3730A3;--primary-900:#312E81;
    --accent-50:#ECFDF5;--accent-100:#D1FAE5;--accent-400:#34D399;--accent-500:#10B981;
    --accent-600:#059669;--accent-700:#047857;
    --gray-50:#F8FAFC;--gray-100:#F1F5F9;--gray-200:#E2E8F0;--gray-300:#CBD5E1;
    --gray-400:#94A3B8;--gray-500:#64748B;--gray-600:#475569;--gray-700:#334155;
    --gray-800:#1E293B;--gray-900:#0F172A;
    --success:#10B981;--warning:#F59E0B;--error:#EF4444;--info:#3B82F6;
    --bg-body:var(--gray-50);--bg-card:#FFFFFF;--bg-header:rgba(255,255,255,.85);
    --text-primary:var(--gray-800);--text-secondary:var(--gray-500);--text-light:var(--gray-400);
    --border-color:var(--gray-200);--border-light:var(--gray-100);
    --shadow-xs:0 1px 2px rgba(0,0,0,.05);--shadow-sm:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
    --shadow-md:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -2px rgba(0,0,0,.1);
    --shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);
    --shadow-xl:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.1);
    --radius-sm:6px;--radius:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;
    --transition-fast:150ms ease;--transition:200ms ease;--transition-slow:300ms ease;
    --max-width:1200px;--header-height:68px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;font-size:16px;line-height:1.6;color:var(--text-primary);background:var(--bg-body);min-height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--primary-600);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--primary-700)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit;font-size:inherit;border:none;background:none}
input,textarea,select{font-family:inherit;font-size:inherit}

/* ===== HEADER ===== */
.header{position:sticky;top:0;z-index:1000;height:var(--header-height);background:var(--bg-header);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);transition:box-shadow var(--transition)}
.header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.25rem;color:var(--text-primary);text-decoration:none}
.logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--primary-500),var(--primary-700));border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem}
.logo span{background:linear-gradient(135deg,var(--primary-600),var(--primary-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-desktop{display:flex;align-items:center;gap:8px}
.nav-link{padding:8px 16px;border-radius:var(--radius-full);color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:var(--transition)}
.nav-link:hover,.nav-link.active{color:var(--primary-600);background:var(--primary-50)}
.menu-toggle{display:none;width:40px;height:40px;border-radius:var(--radius);align-items:center;justify-content:center;color:var(--text-primary);transition:var(--transition)}
.menu-toggle:hover{background:var(--gray-100)}
.menu-toggle svg{width:24px;height:24px}
.nav-mobile{display:none;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:999;opacity:0;visibility:hidden;transition:var(--transition-slow)}
.nav-mobile.open{opacity:1;visibility:visible}
.nav-mobile-content{background:var(--bg-card);padding:16px;border-bottom:1px solid var(--border-color);max-height:80vh;overflow-y:auto;transform:translateY(-10px);transition:var(--transition-slow)}
.nav-mobile.open .nav-mobile-content{transform:translateY(0)}
.nav-mobile-link{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius);color:var(--text-primary);font-weight:500;transition:var(--transition)}
.nav-mobile-link:hover{background:var(--primary-50);color:var(--primary-600)}

/* ===== HERO ===== */
.hero{padding:60px 24px 40px;text-align:center;background:linear-gradient(180deg,var(--primary-50) 0%,var(--bg-body) 100%)}
.hero h1{font-size:clamp(1.75rem,4vw,2.75rem);font-weight:800;color:var(--gray-900);margin-bottom:16px;line-height:1.2}
.hero h1 .gradient-text{background:linear-gradient(135deg,var(--primary-600),var(--accent-500));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:clamp(1rem,2vw,1.2rem);color:var(--text-secondary);max-width:600px;margin:0 auto 32px}
.search-container{max-width:500px;margin:0 auto;position:relative}
.search-input{width:100%;padding:14px 20px 14px 48px;border:2px solid var(--border-color);border-radius:var(--radius-full);font-size:1rem;background:var(--bg-card);color:var(--text-primary);transition:var(--transition);outline:none}
.search-input:focus{border-color:var(--primary-400);box-shadow:0 0 0 3px var(--primary-100)}
.search-input::placeholder{color:var(--text-light)}
.search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-light);pointer-events:none}
.search-icon svg{width:20px;height:20px}

/* ===== CATEGORY TABS ===== */
.category-tabs{display:flex;justify-content:center;gap:8px;padding:0 24px;margin-bottom:32px;flex-wrap:wrap}
.category-tab{padding:8px 20px;border-radius:var(--radius-full);font-size:.875rem;font-weight:500;color:var(--text-secondary);background:var(--bg-card);border:1px solid var(--border-color);cursor:pointer;transition:var(--transition)}
.category-tab:hover{border-color:var(--primary-300);color:var(--primary-600)}
.category-tab.active{background:var(--primary-600);color:#fff;border-color:var(--primary-600)}

/* ===== TOOL CARDS GRID ===== */
.tools-section{max-width:var(--max-width);margin:0 auto;padding:0 24px 60px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}
.tool-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;transition:var(--transition);cursor:pointer;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:12px}
.tool-card:hover{border-color:var(--primary-300);box-shadow:var(--shadow-lg);transform:translateY(-2px);color:inherit}
.tool-card-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem}
.tool-card-icon.pdf{background:#FEE2E2;color:#DC2626}
.tool-card-icon.image{background:#DBEAFE;color:#2563EB}
.tool-card-icon.utility{background:#D1FAE5;color:#059669}
.tool-card-icon.text{background:#FEF3C7;color:#D97706}
.tool-card-icon.security{background:#EDE9FE;color:#7C3AED}
.tool-card h3{font-size:1rem;font-weight:600;color:var(--text-primary)}
.tool-card p{font-size:.875rem;color:var(--text-secondary);line-height:1.5}
.tool-card-badge{display:inline-flex;align-items:center;gap:4px;font-size:.75rem;font-weight:500;color:var(--accent-600);background:var(--accent-50);padding:4px 10px;border-radius:var(--radius-full);width:fit-content}

/* ===== TOOL PAGE LAYOUT ===== */
.tool-page{flex:1}
.tool-header{padding:32px 24px 24px;text-align:center;background:linear-gradient(180deg,var(--primary-50) 0%,var(--bg-body) 100%)}
.breadcrumb{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:16px;font-size:.875rem;color:var(--text-light)}
.breadcrumb a{color:var(--text-secondary)}.breadcrumb a:hover{color:var(--primary-600)}
.breadcrumb-separator{color:var(--text-light)}
.tool-header h1{font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--gray-900);margin-bottom:8px}
.tool-header p{font-size:1rem;color:var(--text-secondary);max-width:600px;margin:0 auto}
.tool-container{max-width:900px;margin:0 auto;padding:0 24px 60px}
.tool-area{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px;margin-bottom:32px;box-shadow:var(--shadow-sm);position:relative}

/* ===== DRAG & DROP ===== */
.drop-zone{border:2px dashed var(--border-color);border-radius:var(--radius-md);padding:48px 24px;text-align:center;cursor:pointer;transition:var(--transition);background:var(--gray-50)}
.drop-zone:hover,.drop-zone.dragover{border-color:var(--primary-400);background:var(--primary-50)}
.drop-zone-icon{font-size:2.5rem;margin-bottom:12px;color:var(--text-light)}
.drop-zone-text{font-size:1rem;color:var(--text-secondary);margin-bottom:4px}
.drop-zone-hint{font-size:.8rem;color:var(--text-light)}
.drop-zone input[type="file"]{display:none}

/* ===== FILE LIST ===== */
.file-list{margin-top:20px;display:flex;flex-direction:column;gap:8px}
.file-item{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--gray-50);border:1px solid var(--border-color);border-radius:var(--radius);transition:var(--transition)}
.file-item:hover{background:var(--gray-100)}
.file-item-icon{font-size:1.25rem;flex-shrink:0}
.file-item-info{flex:1;min-width:0}
.file-item-name{font-size:.9rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-item-size{font-size:.75rem;color:var(--text-light)}
.file-item-remove{width:32px;height:32px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:var(--text-light);transition:var(--transition);flex-shrink:0}
.file-item-remove:hover{background:#FEE2E2;color:var(--error)}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius);font-weight:600;font-size:.95rem;transition:var(--transition);border:none;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn-primary{background:var(--primary-600);color:#fff}
.btn-primary:hover{background:var(--primary-700);color:#fff;box-shadow:var(--shadow-md)}
.btn-primary:disabled{background:var(--gray-300);cursor:not-allowed;box-shadow:none}
.btn-accent{background:var(--accent-500);color:#fff}
.btn-accent:hover{background:var(--accent-600);color:#fff}
.btn-outline{background:transparent;color:var(--text-secondary);border:1px solid var(--border-color)}
.btn-outline:hover{border-color:var(--primary-400);color:var(--primary-600);background:var(--primary-50)}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-lg{padding:14px 32px;font-size:1.05rem}
.btn-block{width:100%}
.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius)}

/* ===== FORM ELEMENTS ===== */
.form-group{margin-bottom:20px}
.form-label{display:block;font-size:.875rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}
.form-input{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:.95rem;color:var(--text-primary);background:var(--bg-card);transition:var(--transition);outline:none}
.form-input:focus{border-color:var(--primary-400);box-shadow:0 0 0 3px var(--primary-100)}
.form-select{width:100%;padding:10px 14px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:.95rem;color:var(--text-primary);background:var(--bg-card);transition:var(--transition);outline:none;cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748B' viewBox='0 0 16 16'%3E%3Cpath d='M4.646 5.646a.5.5 0 01.708 0L8 8.293l2.646-2.647a.5.5 0 01.708.708l-3 3a.5.5 0 01-.708 0l-3-3a.5.5 0 010-.708z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}
.form-select:focus{border-color:var(--primary-400);box-shadow:0 0 0 3px var(--primary-100)}
.form-textarea{width:100%;padding:12px 14px;border:1px solid var(--border-color);border-radius:var(--radius);font-size:.95rem;color:var(--text-primary);background:var(--bg-card);transition:var(--transition);outline:none;resize:vertical;min-height:120px;font-family:'SF Mono','Fira Code','Fira Mono',Menlo,Consolas,monospace;line-height:1.6}
.form-textarea:focus{border-color:var(--primary-400);box-shadow:0 0 0 3px var(--primary-100)}
.form-hint{font-size:.8rem;color:var(--text-light);margin-top:4px}
.form-row{display:flex;gap:16px;align-items:flex-end}
.form-row .form-group{flex:1}
.form-range{width:100%;-webkit-appearance:none;height:6px;border-radius:3px;background:var(--gray-200);outline:none;transition:var(--transition)}
.form-range::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--primary-600);cursor:pointer;border:3px solid #fff;box-shadow:var(--shadow-sm)}
.form-check{display:flex;align-items:center;gap:8px;cursor:pointer}
.form-check input{width:18px;height:18px;accent-color:var(--primary-600);cursor:pointer}

/* ===== RESULT / OUTPUT ===== */
.result-area{margin-top:24px;padding:20px;background:var(--gray-50);border:1px solid var(--border-color);border-radius:var(--radius-md)}
.result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.result-title{font-weight:600;font-size:1rem}
.result-actions{display:flex;gap:8px}
.result-content{font-family:'SF Mono','Fira Code',monospace;font-size:.875rem;line-height:1.6;white-space:pre-wrap;word-break:break-all;background:var(--gray-900);color:#E2E8F0;padding:16px;border-radius:var(--radius);max-height:400px;overflow-y:auto}
.image-preview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-top:16px}
.image-preview-item{position:relative;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border-color);aspect-ratio:1}
.image-preview-item img{width:100%;height:100%;object-fit:cover}

/* ===== PROGRESS BAR ===== */
.progress-bar{width:100%;height:8px;background:var(--gray-200);border-radius:4px;overflow:hidden;margin:16px 0}
.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--primary-500),var(--accent-500));border-radius:4px;transition:width .3s ease}

/* ===== TOAST ===== */
.toast-container{position:fixed;bottom:24px;right:24px;z-index:10000;display:flex;flex-direction:column;gap:8px}
.toast{padding:14px 20px;background:var(--gray-900);color:#fff;border-radius:var(--radius);font-size:.9rem;font-weight:500;box-shadow:var(--shadow-xl);animation:slideInRight .3s ease;display:flex;align-items:center;gap:10px;max-width:360px}
.toast.success{border-left:4px solid var(--success)}
.toast.error{border-left:4px solid var(--error)}
.toast.info{border-left:4px solid var(--info)}
@keyframes slideInRight{from{transform:translateX(100%);opacity:0}to{transform:translateX(0);opacity:1}}

/* ===== SEO CONTENT ===== */
.seo-section{max-width:900px;margin:0 auto;padding:0 24px 60px}
.seo-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px}
.seo-content h2{font-size:1.25rem;font-weight:700;color:var(--gray-900);margin-bottom:16px;margin-top:24px}
.seo-content h2:first-child{margin-top:0}
.seo-content p{color:var(--text-secondary);margin-bottom:12px;line-height:1.7}
.seo-content ul{padding-left:20px;margin-bottom:12px}
.seo-content li{color:var(--text-secondary);margin-bottom:6px;line-height:1.7}
.related-tools{max-width:900px;margin:0 auto;padding:0 24px 60px}
.related-tools h2{font-size:1.25rem;font-weight:700;margin-bottom:16px}
.related-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.related-tool-card{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);text-decoration:none;color:var(--text-primary);font-weight:500;font-size:.9rem;transition:var(--transition)}
.related-tool-card:hover{border-color:var(--primary-300);box-shadow:var(--shadow-sm);color:var(--primary-600)}

/* ===== FOOTER ===== */
.footer{background:var(--gray-900);color:var(--gray-400);padding:48px 24px 32px;margin-top:auto}
.footer-inner{max-width:var(--max-width);margin:0 auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand h3{color:#fff;font-size:1.2rem;margin-bottom:12px}
.footer-brand p{font-size:.9rem;line-height:1.6}
.footer-col h4{color:#fff;font-size:.9rem;font-weight:600;margin-bottom:16px;text-transform:uppercase;letter-spacing:.05em}
.footer-col a{display:block;color:var(--gray-400);font-size:.875rem;padding:4px 0;transition:var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--gray-700);padding-top:24px;text-align:center;font-size:.85rem}

/* ===== UTILITY ===== */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}
.text-center{text-align:center}.text-left{text-align:left}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}
.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}
.flex{display:flex}.flex-wrap{flex-wrap:wrap}.flex-col{flex-direction:column}
.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}
.hidden{display:none !important}.w-full{width:100%}
.copy-btn{padding:6px 12px;border-radius:var(--radius-sm);font-size:.8rem;font-weight:500;color:var(--text-secondary);background:var(--bg-card);border:1px solid var(--border-color);cursor:pointer;transition:var(--transition)}
.copy-btn:hover{border-color:var(--primary-400);color:var(--primary-600)}
.copy-btn.copied{background:var(--accent-50);border-color:var(--accent-500);color:var(--accent-600)}
.options-row{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin:20px 0;padding:16px;background:var(--gray-50);border-radius:var(--radius);border:1px solid var(--border-light)}
.option-group{display:flex;flex-direction:column;gap:4px}
.option-label{font-size:.8rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.03em}
.strength-meter{display:flex;gap:4px;margin-top:8px}
.strength-bar{height:4px;flex:1;border-radius:2px;background:var(--gray-200);transition:var(--transition)}
.strength-bar.active.weak{background:var(--error)}
.strength-bar.active.medium{background:var(--warning)}
.strength-bar.active.strong{background:var(--accent-500)}
.strength-bar.active.very-strong{background:var(--primary-500)}
.password-display{display:flex;align-items:center;gap:8px;padding:16px 20px;background:var(--gray-900);border-radius:var(--radius);font-family:'SF Mono',monospace;font-size:1.2rem;color:#E2E8F0;letter-spacing:1px;word-break:break-all}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}
.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);padding:16px;text-align:center}
.stat-value{font-size:1.5rem;font-weight:700;color:var(--primary-600);margin-bottom:4px}
.stat-label{font-size:.8rem;color:var(--text-secondary);font-weight:500}
.spinner{width:24px;height:24px;border:3px solid var(--gray-200);border-top-color:var(--primary-600);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-overlay{display:none;position:absolute;inset:0;background:rgba(255,255,255,.8);border-radius:var(--radius-lg);align-items:center;justify-content:center;z-index:10}
.loading-overlay.active{display:flex}
.page-thumbnails{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px;margin-top:20px}
.page-thumb{position:relative;border:2px solid var(--border-color);border-radius:var(--radius);overflow:hidden;cursor:move;transition:var(--transition);background:#fff}
.page-thumb:hover{border-color:var(--primary-400);box-shadow:var(--shadow-md)}
.page-thumb.selected{border-color:var(--primary-500);box-shadow:0 0 0 3px var(--primary-100)}
.page-thumb canvas{width:100%;display:block}
.page-thumb-overlay{position:absolute;bottom:0;left:0;right:0;padding:8px;background:linear-gradient(transparent,rgba(0,0,0,.7));display:flex;align-items:center;justify-content:space-between;color:#fff;font-size:.75rem}
.page-thumb-actions{display:flex;gap:4px}
.page-thumb-btn{width:28px;height:28px;border-radius:var(--radius-sm);background:rgba(255,255,255,.2);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;transition:var(--transition)}
.page-thumb-btn:hover{background:rgba(255,255,255,.4)}
.qr-output{display:flex;flex-direction:column;align-items:center;gap:20px;padding:32px;background:#fff;border-radius:var(--radius-md);border:1px solid var(--border-color)}
.qr-output canvas,.qr-output img{border-radius:var(--radius)}
.toggle{position:relative;display:inline-block;width:48px;height:26px}
.toggle input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;inset:0;background:var(--gray-300);border-radius:13px;cursor:pointer;transition:var(--transition)}
.toggle-slider::before{content:'';position:absolute;width:20px;height:20px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:var(--transition);box-shadow:var(--shadow-xs)}
.toggle input:checked+.toggle-slider{background:var(--primary-600)}
.toggle input:checked+.toggle-slider::before{transform:translateX(22px)}

/* ===== RESPONSIVE ===== */
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:768px){
    .nav-desktop{display:none}.menu-toggle{display:flex}.nav-mobile{display:block}
    .hero{padding:40px 16px 24px}
    .tools-section{padding:0 16px 40px}
    .tools-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
    .tool-card{padding:20px}.tool-area{padding:20px}.tool-container{padding:0 16px 40px}
    .footer-grid{grid-template-columns:1fr;gap:24px}
    .form-row{flex-direction:column}.options-row{flex-direction:column;align-items:stretch}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .related-tools-grid{grid-template-columns:1fr}
    .category-tabs{padding:0 16px}.seo-section{padding:0 16px 40px}.related-tools{padding:0 16px 40px}
}
@media(max-width:480px){
    .tools-grid{grid-template-columns:1fr}
    .tool-header{padding:24px 16px 16px}.tool-header h1{font-size:1.4rem}.hero h1{font-size:1.5rem}
    .drop-zone{padding:32px 16px}
    .page-thumbnails{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:8px}
    .image-preview-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}
    .stats-grid{grid-template-columns:1fr 1fr}.password-display{font-size:.95rem}
}
@media print{.header,.footer,.drop-zone,.btn{display:none}}


/* ===== COMPAT CLASSES (worker-generated pages) ===== */
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-weight:600;font-size:.9rem;transition:var(--transition);border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-secondary);cursor:pointer}
.btn-secondary:hover{border-color:var(--primary-400);color:var(--primary-600);background:var(--primary-50)}
.btn-tool,.btn-primary.btn-tool{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:var(--radius);font-weight:700;font-size:1rem;transition:var(--transition);border:none;background:var(--primary-600);color:#fff;cursor:pointer;margin-top:20px;width:100%}
.btn-tool:hover,.btn-primary.btn-tool:hover{background:var(--primary-700);box-shadow:var(--shadow-md)}
.btn-tool:disabled{background:var(--gray-300);cursor:not-allowed}
.btn-danger{color:var(--error)!important}
.btn-danger:hover{background:#FEE2E2!important;color:var(--error)!important}
.badge{display:inline-flex;align-items:center;gap:4px;font-size:.75rem;font-weight:500;color:var(--accent-600);background:var(--accent-50);padding:4px 10px;border-radius:var(--radius-full);width:fit-content}
.tool-options{margin-top:20px;display:flex;flex-direction:column;gap:16px}
.option-group label{display:block;font-size:.875rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}
.progress-container{margin:16px 0}
.progress-fill{height:8px;background:linear-gradient(90deg,var(--primary-500),var(--accent-500));border-radius:4px;transition:width .3s ease}
.progress-text{font-size:.85rem;color:var(--text-secondary);margin-top:6px}
.result-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:20px;margin-bottom:16px}
.result-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;flex-wrap:wrap;gap:8px}
.result-card-body{margin-top:8px}
.img-preview{max-width:100%;border-radius:var(--radius);border:1px solid var(--border-color)}
.drag-over,.drop-zone.drag-over{border-color:var(--primary-400)!important;background:var(--primary-50)!important}
.file-item-actions{display:flex;gap:4px;align-items:center}
.calc-section{margin-bottom:24px}